Layout Builder iFrame Modal security updates, in plain English

Layout Builder iFrame Modal

9,404 sites report using it · on drupal.org · 1 security update explained here

This module shows page layout editing forms inside a popup window using the administration design.

Below is every security update for Layout Builder iFrame Modal that this site has covered, newest first. Each one says who could exploit it, whether it applies to your site, how urgent it is, and what to tell your developer. If your site uses this module and you are not sure which version, that is the first question to ask whoever looks after it.

Layout Builder iFrame Modal

Moderately critical · 9,404 sites report using it · SA-CONTRIB-2026-335 · on drupal.org · Week of 11 November 2026

The command used to open the popup window does not properly clean the options it receives. Someone with an ordinary account could run harmful code in the browser of other visitors. They could access hidden data and modify information on the site.

Who could do thisOnly someone with a login on your site.
Does it apply to youA site is affected if an attacker can control the response from the server or add specific code to a page.
Has it been used in attacksNo sign of it.
How urgentDrupal rates this moderately critical. Include it in your next routine update, within the month.

Tell your developerUpdate Layout Builder iFrame Modal to 1.3.9.

For developers: what the fix changed

The fix updates the `render` method in `src/Ajax/OpenIframeCommand.php` to reuse the parent `OpenDialogCommand::render` logic, ensuring dialog options are properly sanitized.

Also in this release Added origin checks to postMessage listeners and updated tests for Drupal 12 compatibility.

1.3.8 to 1.3.9 5 commits, 5 files including 2 tests.

js/iframe.js +4 −0
js/redirect.js +1 −1
src/Ajax/OpenIframeCommand.php +5 −8 fix

Full diff, 1.3.8 to 1.3.9

The comparison is against the release immediately before the fix. If your site is on an older release, more will have changed.

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Layout Builder iFrame Modal

Layout Builder iFrame Modal

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